Question #8892a

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Answer 1 · 2017-02-25T04:29:55

The passenger's velocity is indeterminate from the information given (no direction).
The passenger's speed relative to the ground is $25.0 (km)/h$

The train is moving at a speed relative to the ground $W = 30.0(km)/h$

The passenger is moving at a speed relative to the train $E = 5.0(km)/h$

To calculate the relative speed of the passenger to the ground, $PGS$ we would add his speed to the speed of the train relative to the ground.

$PGS = W + E$

But here the direction of travel for the passenger is opposite that of the train, so his speed becomes a negative value.

$PGS = W - E$

$PGS = 30.0 - 5.0 = 25.0(km)/h$

If the train were to be travelling north at this moment, the passenger would be travelling at a $velocity 25.0(km)/h$ north relative to the ground.